Check this out for a disaster! People with money sitting where they like, it's not a suprise. The organisers blamed a few "opportunistic fans" sitting in the wrong seats, not the staff who were to move them and direct them to their seats.
They also blamed the roadworks and bad weather conditions. Now I was in the traffic jam because I live out that direction and the weather was a bit wet but no worse than it has been and the traffic on the roundabout is not restricted in any way going across that roundabout.
Sounds like the organisers and promotors were a shambles!